Quantum Theory is not as bad as many make it out to be, but it is far from ideal. From a technical standpoint, the game is solid with a good soundtrack, graphics fitting for this console generation, and intuitive controls. From a gameplay standpoint, it is quite messy as the art style isn't all that appealing, the characters feel indifferent, and the story ultimately goes nowhere. There is a good amount of action, but the story fails to convey a real purpose, making the whole affair feel pointless. The title is a decent rental that can provide fun for a few hours, but don't be surprised if the desire to finish the game slips away before the end credits roll.